A book which might be of great interest to people here:

Food, Nutrition and the Prevention of Cancer: a global perspective

http://www.wcrf-uk.org/report/index.lasso

An excerpt from the Introduction:

      INTRODUCTION   
     
         
     
        Those wishing to understand the relationship between food, nutrition and cancer, and to identify cancer as a largely preventable disease, are faced with several fundamental questions. This applies to all those individuals and agencies addressed by this report: to policy-makers in government, non-government agencies and industry; to research scientists, medical and health professionals, consumer advocates, and community workers; to editors, writers and journalists; and to individual citizens. These questions include: when is the evidence of a relationship between any aspect of food and nutrition and cancer strong enough to justify recommendations to policy-makers, health professionals and the general public? How can the importance of food and nutrition in the modification of cancer risk be compared with other lifestyle and environmental factors, and with the effects of genetic susceptibility, the play of chance and the ageing process? Why are the diets of industrialised countries and regions often identified as increasing the risk of various cancers, when the people who eat such diets generally live longer than people in the developing world? Can cancer be prevented by dietary or other means? If so how? We have attempted to address some of these questions in this report.

           
     
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